- I have not been in bluetooth range of one of the infected.
- Not nearly enough people have opted in to this system.
- Not nearly enough of those who have become infected have volunteered that information to the system.
My phone says I had 82 exposure checks in the last 14 days, which seems to be all that it saves. I guess that sounds low?
Exposure notifications are a deeply flawed system (proximity is a poor substitute for contact tracing) but false positives should be expected to be the most common failure mode.